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ISL6539CAZ Datasheet(PDF) 8 Page - Intersil Corporation

Part # ISL6539CAZ
Description  Wide Input Range Dual PWM Controller with DDR Option
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL6539CAZ Datasheet(HTML) 8 Page - Intersil Corporation

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Block Diagram
ERROR AMP 1
VSEN1
300k
PWM1
+ 0.9V
ISEN1
140
SAMPLE
CURRENT
SAMPLE
CURRENT
PHASE1
PGND1
UGATE1
BOOT1
LGATE1
VCC
+
0.9V REFERENCE
OCSET1
1/2.9
OCSET1
1/33.1
ISEN1
ERROR AMP 2
ADAPTIVE DEAD-TIME
VSEN2
1M
16.7pF
1.25pF
500k
300k
PWM2
+
0.9V
ISEN2
140
SAMPLE
CURRENT
SAMPLE
CURRENT
PHASE2
PGND2
UGATE2
BOOT2
LGATE2
VCC
DIODE EMULATION
V/I SAMPLE TIMING
+
0.9V REFERENCE
OCSET2
1/2.9
OCSET2
1/33.1
ISEN2
DDR
VIN
VCC
DUTY CYCLE RAMP GENERATOR
PWM CHANNEL PHASE CONTROL
OC2
OC1
DDR = 0
DDR = 1
DDR VTT
DDR = 0
DDR = 1
8 CLOCK CYCLES
SAME STATE FOR
REQUIRED TO LATCH
OVERCURRENT FAULT
8 CLOCK CYCLES
SAME STATE FOR
REQUIRED TO LATCH
OVERCURRENT FAULT
VCC
PG1
REFERENCE
OV UV
PGOOD
DDR VREF
BUFFER AMP
DDR = 1
DDR = 0
1.25pF
500k
1M
16.7pF
OV UV
PGOOD
ADAPTIVE DEAD-TIME
DIODE EMULATION
V/I SAMPLE TIMING
OC1 DDR
POR
FAULT LATCH
BIAS SUPPLIES
REFERENCE
ENABLE
SOFT-START
GND
EN1
EN2
REF/PG2
SOFT1
SOFT2
DDR MODE
CONTROL
OC2
REF
REF
(200k
Ω, DDR = 1)
4.4k
4.4k
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
DDR EN1 EN2
VIN
CH1 CH2
φ
01
1
5V
15.0V
180°
1
1
1
VIN = 5V
90°
VIN = GND


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